So the thing is, before bringing in Nyx, you have to activate the portal, remember how it says you gotta look for clues inside that room? There are 3 gems laying around, that is the first order of colors you have to use to activate the portal.
yes, that step is required. there are three gems and also scratched into the wall the code
Wait what? It was in the wall this whole time? I never saw i
You only see that while the portal is unactivated